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Syntax
Graticule
Central Meridian: A straight line.
Meridians: Circular curves spaced equally along the equator and concave toward the central meridian.
Parallels: The Equator is a straight line. All other parallels are circular arcs concave toward the nearest pole.
Symmetry: About the Equator or the central meridian.
Features
In this projection, the world is enclosed in a circle. Scale is true along the Equator and increases rapidly away from the Equator. Area distortion is extreme near the poles. This projection is neither conformal nor equal-area.
Parallels
There are no standard parallels for this projection.
Remarks
This projection was presented by Alphons J. Van der Grinten in 1898. He obtained a U.S. patent for it in 1904. It is also known simply as the Van der Grinten projection (without the "I").
Limitations
This projection is available for the spherical geoid only.
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